Fireless cooker.



R. M. G. PHILLIPS.

FIRELESS COOKER.

APPLICATION FILED MAR. 21, 1914.

1 1Q3,539, Patented July 14,1914.

2 SHEETS-SHEET 1.

R. M. G. PHILLIPS.

FIRELESS COOKER.

APPLICATION FILED MAR. 21, 1914.

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UNITED srnirns ig rnn'r ROSS M. G. PHILLIPS, OF WEST HAVEN, CONNECTICUT, ASSIGNOR TO THE AUTGMAEEC STOVE C0,, MINNEAPOLIS, MINNESOTA, A CORPORATION.

FIRELESS COOKER.

Specification of Letters Eatent.

Patented Jul 19 Original application filed February 12, 1914, Serial No. 818,279. Divided and this application filed March 21, 1914. Serial No. 826,417.

To all whom it may concern:

Be it known that 1, Ross M. G. PHILLIPS, a citizen of the United States, residing at lVest Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Fireless Cookers; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full. clear, and exact description ofthe same, and which said drawings constitute part of this application, and represent, iii- Figure- 1 a view in front elevation of a fireless cooker constructed in accordance with my invention. Fig. 2 a-broken view thereof in vertical central section from front to rear, showing the preheater or burner in its draft-closing or heat-conserving position. Fig. 3 a corresponding View showing the preheater or burner in its spaced intermediate or heating position by full lines, and shown in its retracted or lighting position by broken lines. Fig. 4 a detached sectional View of the burner-in front elevation on the line ab of Fig. 3.

My invention relates to an improvement in that class of automatic cook-stov which, at a predetermined time, the pvt-l. r is extinguished and the draft through insulated food-container closed for the conservation of the heat stored therein. the object be ing to produce a convenient, reliable and safe apparatus of the character described.

With these ends in view, my invention consists in a cook-stove having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I locate a removable cylindrical cooking receptacle 2. within a stationary cylindrical insulated food-container having double walls 3 and 4 with the annular space between the same packed with an insulating material 5 such as asbestos or magnesium. The bottom of the said food-container is formed with a large concentric opening 6 forming an ingress draft-passage and also forming a temporary receivingchamber for the preheater or burner 7 which is vertically movable with respect to the said passage. receptacle and container in line with the axes thereof. The said receptacle is supported within the said container so as to clear the bottom thereof by small feet 8, whereby draft-passages 9 and 10 are produced, re spectively, between the bottom of the receptacle and the bottom of the food-container, and between the sides of the teed-conta and the sides of the receptacle, the sa? ceptacle being enough smaller than the internal diameter of the food-container to produce the draft-passages 9 and 10 in question.

As shown, the food-container is provided 05 at its upper end with a rim 11 formed with a circumferential shoulder 12 resting upon a casing 13 which may be of any desired form and which, as shown, is supported upon legs 14. The inner face of the rim 11 beveled as at 15 and formed with a channel is for the reception of a packing-ring 17 which coacts with the beveled edge 18 of an insulated cover 19 which, when in position, as shown in Figs. 2 and 3, is separated from the top of the receptacle 2 by means of a narrow draft-passage 20 which leads to an caress draft-passage 21 formed in the center 0 the said cover. The central portion of th ii 22 of the said'cover 19, is struck inn" the egress draft-passage 21 to iorrnv a perforated disir 23 which forms be i'in for thlower end of a helical spring end of which is inserted into formed for it in the center of a beted as at 26 to adapt it to be set over the upper edge of the rim for conservation of the heat stored "within container.

The preheater or burner 7 wiii, of course, be determined in its character by the char actor of the fuelused As shown, it is formed at its lower edge with an annuiar draft-closing flange 2. which, when the burner is in its closed or heat-conserving position as shown in Fig. 2, entirely closes the lower end oi the concentric ingress draf passage (3 in the bottom of the container.

The burner 7 is provided, as shown, with. a pair of depending supporting-arms 28 receiving between them two extension or telescoping tubes 29 and 30 located one above the other in the same vertical plane, the said arms and being secured to the said tubes by means of pivots 31, 31. The said tubes 29 and 30 are respectively sleeved over rods 32 and 33 located one above the other in the same vertical plane and having their rear ends attached by pivots '34, 34, to a bracket 35 depending from the bottom of the casing 13. The said rods 32 and 33 are spaced apart by means of a spacing-link 36 secured at its upper and lower ends to the respective rods by pivots 37 37. The outer ends of the tubes are similarly connected by a spacing-link 38 pivotally connected to them by meansof pivots 39, 39. The lower tube 30 is made longer than the upper tube 29 for the attachment of a handle 40. The said tubes, rods and their appurtenances constitute an'extension-Carrier or fixture for the carriage and vertical and lateral movement of the preheater or burner 7 as will be described later on. Theouter end of the said upper tube 29 is formed with a nose 41 coacting with the depending latch-arm 42 of a tripplng-lever 43 hung upon a pivot 44 in a bracket 45 secured to the front of the casing 13, and furnished with an upwardly eXtend-. ing finger-piece 46 by which the lever is manually set, and with an inwardly extending-tri'pping-arm 47 which passes under a horizontally arranged operating-lever 48 one end of which is pivoted to a bracket 49 located back of the front of the casing 13. The opposite end of the lever 48 extends directly under a weight 50 located within the casing 13 and connected by a cord 51 with a clock-like mechanism 52 the details of which are not shown. This mechanism is furnished with a handle 53 by means of which the weight 50 is raised to a predetermined height gaged b sight-openings 54 in the casing 13. These sight-holes are arranged in a vertical series and adjacent to them are placed nu merals 15, 30, 45, indicating time. When the bottom of the weight 50 is raised to the level of the lowest hole 54, it will take fifteen minutes for the weight to descend under the control of the clock-like train 52,'into position to operate the lever 48 on tripping the lever 43. By turning the handle 53 to raise the weight 50 to the level of the middle hole 54, it will take thirty minutes for the weight 50 to descend into position to trip the lever 43. Of course the time intervals may be varied as desired, the principle only being illustrated. As soon as the trippin -lever 43 is operated to disengage its late -arm 42 from the nose 41, a spring 55, as shown, operates to raise the extensible preheater-carrier and the preheater 7 into their closed or heat-conserving positions, this spring being interposed between the bottom of the casing 13 and the rear extension 56 of the lower rod 33. It will be seen from the foregoing that I employ spacing-mechanism for holding the movable preheater in spaced relation to the food-container, and timing-mechanism for controlling the releasing action of the spacing-mechanism.

In using my improved cook-stovefthe extensible preheater-carrier is first grasped by its handle 40 and depressed against the tension of the spring 55 to clear the preheater 7 from the ingress draft-opening 6 after which the handle 40 is pulled forward to cause the tubes 29 and 30 to ride over the rods 32 and 33, whereby the preheater or burner 7 is drawn laterally forward into the position in which it is shown by broken lines in Fig. 3 and in which'it is exposed on the outside of the casing 13. In this ex posed and accessible position the preheater may be charged with alcohol or other fuel and lighted in the open air, whereby my improved cook stove isrendered immune against the danger of explosion inherent in 30 the use of preheaters which must be lighted in situ under the food-container and within the casing where gases are apt to accumulate under confinement if any time is permitted to elapse between the turning on of the gas 5 or the generation of the vapor and the lighting of the preheater. After the burner 7 has been lighted in its retracted and exposed position,-the burner-carrier is telescoped, as may be said, by pushing it inward after the burner 7 has been re-registered with the ingress draft-passage 6. When this has been done, downward pressure upon the handle 40 is removed, and the spring 55 permitted to. raise the burner into its spaced intermediate or heating position in which the nose 41 engages with the lower end of the latcharm 42' ofthe tripping-lever 43 as shown by full lines in Fig. 3. In this spaced position of the burner 7 and burner-carrier, the ingress draft-passage 6 is left sufficiently open at its lower end to take in all of the air required for combustion. The heat generated by the burner now passes upward through the draft-passages 9 and 10 and heats the cooking receptacle 2 and the inner walls of the container, whereby the apparatus will be charged with an amount of heat proportionate to the duration of 'thc flame. Meanwhile the handle 53 has been operated to raise the weight 50 to the height required to consume in its descent under the control of the clocklike mechanism 52, the predetermined time required for the heating of the apparatus. \Vhen the time expires the weight will operate the lever 48 which will in turn operate the tripping'lever 43, whereby the spring 55 will be left free to lift the burner 7 into its closed or heat-conserving position in which the flange 27 entirely closes the ingress draf -passage 6. It may be said in this connection that if an alcohol burner is used,

the amount of alcohol supplied to it will be proportioned in volume to the length of time which it is desired the preheating action of the burner shall cover." The tripping device will accordingly be set to trip the burner and permit thesame to go into its draft-closing position just as soon as the light goes out. The burner having been eX- i accordance with my tinguished, as described, the lid 25 is placed upon the rim 11, whereby the spring 24 will crowd the cover 19 down firmly into the rim. The receptacle 2 will then be tightly shut in by the cover 19, while hot air will be prevented from escaping through the perforated disk by the lid 25. The draft through the container having now been closed both top and bottom, the heat stored in the container during the preheating period, will be conserved. for the gradual cooking of the food within the receptacle 2.

It is apparent that changes from the construction herein shown and described may be\, made in carrying out my invention, which consists broadly in the use of a stationary food-container in combination with a preheater movable toward and away from it. whether or not the preheater is also adapted to be additionally moved into an exposed position where it may be conveniently charged and lighted, either or both. carrier constructed in invention provides for moving the burner vertically into its heating and heat-conserving positions, and laterally into its lighting position without tilting it so as to cause it to fail to register with the ingress draft-passage or to spill its fuel, if liquid fuel is employed.

I do not broadly claim in this application a tireless cooker in which a preheater is movable toward and away from a food-container and held in spaced relation thereto by spacing mechanism released to permit the preheater to move toward the burner by means of timing-mechanism, that being claimed in my co-pending application, Serial No. 818,279, filed February 12, 1914, of which this present application is a division.

I claim 1. In a cook-stove, the combination with a stationary food-container, of a preheater adapted to be moved into heating, and heatconserving positions with respect to the said container and into a lighting position.

2. In a cook-stove, the combination with a, casing, of an insulated food-container A preheater formed with an ingress draft-passage, a preheater located below the said container in line with the said draft-passage therein, and a preheater-carrier by means of which the preheater-is moved into its heating and heat-conserving positions with respect to the said passage and into a lighting position with respect to the said casing.

In a cook-stove, the combination with a food-container having an ingress draft-passage in its lower end, of a preheater located below the said food-container in line with the said draft-passage, and a telescopic preheater-carrier mounting the preheater and providing for moving it into its lighting, heating and heat-conserving positions.

4. In a cook-stove, the combination with a food-container having an in ress draft-pas sage, of a preheater movable toward and away from the said draft-passage and provided with an annular flange for the closure of the same, and means for automatically moving the said preheater into position for closing the said passage.

5. In a cook-stove, the combination With a food-container having an ingress draftpassage, of a preheater movable in line with the said container into heating and heatconserving positions, and laterally with respect to the said line into a lighting position.

6. In a cook-stove, the combination with a casing, of a food-container having an ingress draft-passage, a movable preheater adapted to form a closure for the said passage, spacing mechanism for holding the said preheater in spaced relation to the said draft-passage, and means for controlling the releasing action of the said spacing mechanism whereby the said preheater acts to close the said passage.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ROSS M. G. PHILLIPS.

lVitnesses:

Fnnonmc C. EARLE, M. P. Nicnots. 

